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Re: PCI reset on soft boot



Jeff,

as far as I know there is no such requirement.

Soft resets just activate the KBD-Controller's reset output (through the
BIOS or DOS). It's a chip set issue how they handle keyboard resets. Some
just activate a warm reset for the CPU, others perform a hard reset by
driving the CPU,  PCI and ISA resets active.
Most machines I have seen do a hard reset.

Regards,

Peter Marek
General Director
MarekMicro GmbH
Kropfersrichter Str. 6-8
D-92237 Sulzbach-Rosenberg
Germany
Phone: 049 - 9661 - 908 - 210
Fax:      049 - 9661 - 908 - 100
----- Original Message -----
From: Jeff Dahlin <JDahlin@appiangraphics.com>
To: 'PCI-SIG' <pci-sig@znyx.com>
Sent: Friday, April 28, 2000 1:58 AM
Subject: PCI reset on soft boot


> I apologize first for bringing up an OS dependant issue, but I have not
been
> able to find this out through other channels.
>
> On some PC systems that we are working with we have seen no reset on the
PCI
> bus when a soft boot (Ctrl-Alt-Del) occurs.  This tends to wreak havoc
with
> our board since our device ends up in an unknown state when the boot ROM
> executes.
>
> Does anyone know of a requirement (PCI or otherwise) for a system to issue
a
> reset at times other than power up?
>
> Thanks,
> Jeff Dahlin
> Senior Project Engineer
> Appian Graphics
> jdahlin@appiangraphics.com
> (425)882-2020